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Sync with 2.19.6
[alt-git.git] / compat / mingw.c
blobec27f58f0601a998492d7ea4ad826d93ec6f957b
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include <wchar.h>
5 #include "../strbuf.h"
6 #include "../run-command.h"
7 #include "../cache.h"
8 #include "win32/lazyload.h"
9 #include "../config.h"
10
11 #define HCAST(type, handle) ((type)(intptr_t)handle)
12
13 static const int delay[] = { 0, 1, 10, 20, 40 };
14
15 int err_win_to_posix(DWORD winerr)
16 {
17 int error = ENOSYS;
18 switch(winerr) {
19 case ERROR_ACCESS_DENIED: error = EACCES; break;
20 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
21 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
22 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
23 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
24 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
25 case ERROR_BAD_COMMAND: error = EIO; break;
26 case ERROR_BAD_DEVICE: error = ENODEV; break;
27 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
28 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
29 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
30 case ERROR_BAD_LENGTH: error = EINVAL; break;
31 case ERROR_BAD_PATHNAME: error = ENOENT; break;
32 case ERROR_BAD_PIPE: error = EPIPE; break;
33 case ERROR_BAD_UNIT: error = ENODEV; break;
34 case ERROR_BAD_USERNAME: error = EINVAL; break;
35 case ERROR_BROKEN_PIPE: error = EPIPE; break;
36 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
37 case ERROR_BUSY: error = EBUSY; break;
38 case ERROR_BUSY_DRIVE: error = EBUSY; break;
39 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
40 case ERROR_CANNOT_MAKE: error = EACCES; break;
41 case ERROR_CANTOPEN: error = EIO; break;
42 case ERROR_CANTREAD: error = EIO; break;
43 case ERROR_CANTWRITE: error = EIO; break;
44 case ERROR_CRC: error = EIO; break;
45 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
46 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
47 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
48 case ERROR_DIRECTORY: error = EINVAL; break;
49 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
50 case ERROR_DISK_CHANGE: error = EIO; break;
51 case ERROR_DISK_FULL: error = ENOSPC; break;
52 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
53 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
54 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
55 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
56 case ERROR_FILE_EXISTS: error = EEXIST; break;
57 case ERROR_FILE_INVALID: error = ENODEV; break;
58 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
59 case ERROR_GEN_FAILURE: error = EIO; break;
60 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
61 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
62 case ERROR_INVALID_ACCESS: error = EACCES; break;
63 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
64 case ERROR_INVALID_BLOCK: error = EFAULT; break;
65 case ERROR_INVALID_DATA: error = EINVAL; break;
66 case ERROR_INVALID_DRIVE: error = ENODEV; break;
67 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
68 case ERROR_INVALID_FLAGS: error = EINVAL; break;
69 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
70 case ERROR_INVALID_HANDLE: error = EBADF; break;
71 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
72 case ERROR_INVALID_NAME: error = EINVAL; break;
73 case ERROR_INVALID_OWNER: error = EINVAL; break;
74 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
75 case ERROR_INVALID_PASSWORD: error = EPERM; break;
76 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
77 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
78 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
79 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
80 case ERROR_IO_DEVICE: error = EIO; break;
81 case ERROR_IO_INCOMPLETE: error = EINTR; break;
82 case ERROR_LOCKED: error = EBUSY; break;
83 case ERROR_LOCK_VIOLATION: error = EACCES; break;
84 case ERROR_LOGON_FAILURE: error = EACCES; break;
85 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
86 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
87 case ERROR_MORE_DATA: error = EPIPE; break;
88 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
89 case ERROR_NOACCESS: error = EFAULT; break;
90 case ERROR_NONE_MAPPED: error = EINVAL; break;
91 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
92 case ERROR_NOT_READY: error = EAGAIN; break;
93 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
94 case ERROR_NO_DATA: error = EPIPE; break;
95 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
96 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
97 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
98 case ERROR_OPEN_FAILED: error = EIO; break;
99 case ERROR_OPEN_FILES: error = EBUSY; break;
100 case ERROR_OPERATION_ABORTED: error = EINTR; break;
101 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
102 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
103 case ERROR_PATH_BUSY: error = EBUSY; break;
104 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
105 case ERROR_PIPE_BUSY: error = EBUSY; break;
106 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
107 case ERROR_PIPE_LISTENING: error = EPIPE; break;
108 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
109 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
110 case ERROR_READ_FAULT: error = EIO; break;
111 case ERROR_SEEK: error = EIO; break;
112 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
113 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
114 case ERROR_SHARING_VIOLATION: error = EACCES; break;
115 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
116 case ERROR_SWAPERROR: error = ENOENT; break;
117 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
118 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
119 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
120 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
121 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
122 case ERROR_WRITE_FAULT: error = EIO; break;
123 case ERROR_WRITE_PROTECT: error = EROFS; break;
124 }
125 return error;
126 }
127
128 static inline int is_file_in_use_error(DWORD errcode)
129 {
130 switch (errcode) {
131 case ERROR_SHARING_VIOLATION:
132 case ERROR_ACCESS_DENIED:
133 return 1;
134 }
135
136 return 0;
137 }
138
139 static int read_yes_no_answer(void)
140 {
141 char answer[1024];
142
143 if (fgets(answer, sizeof(answer), stdin)) {
144 size_t answer_len = strlen(answer);
145 int got_full_line = 0, c;
146
147 /* remove the newline */
148 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
149 answer[answer_len-2] = '\0';
150 got_full_line = 1;
151 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
152 answer[answer_len-1] = '\0';
153 got_full_line = 1;
154 }
155 /* flush the buffer in case we did not get the full line */
156 if (!got_full_line)
157 while ((c = getchar()) != EOF && c != '\n')
158 ;
159 } else
160 /* we could not read, return the
161 * default answer which is no */
162 return 0;
163
164 if (tolower(answer[0]) == 'y' && !answer[1])
165 return 1;
166 if (!strncasecmp(answer, "yes", sizeof(answer)))
167 return 1;
168 if (tolower(answer[0]) == 'n' && !answer[1])
169 return 0;
170 if (!strncasecmp(answer, "no", sizeof(answer)))
171 return 0;
172
173 /* did not find an answer we understand */
174 return -1;
175 }
176
177 static int ask_yes_no_if_possible(const char *format, ...)
178 {
179 char question[4096];
180 const char *retry_hook[] = { NULL, NULL, NULL };
181 va_list args;
182
183 va_start(args, format);
184 vsnprintf(question, sizeof(question), format, args);
185 va_end(args);
186
187 if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
188 retry_hook[1] = question;
189 return !run_command_v_opt(retry_hook, 0);
190 }
191
192 if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
193 return 0;
194
195 while (1) {
196 int answer;
197 fprintf(stderr, "%s (y/n) ", question);
198
199 if ((answer = read_yes_no_answer()) >= 0)
200 return answer;
201
202 fprintf(stderr, "Sorry, I did not understand your answer. "
203 "Please type 'y' or 'n'\n");
204 }
205 }
206
207 /* Windows only */
208 enum hide_dotfiles_type {
209 HIDE_DOTFILES_FALSE = 0,
210 HIDE_DOTFILES_TRUE,
211 HIDE_DOTFILES_DOTGITONLY
212 };
213
214 static enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
215 static char *unset_environment_variables;
216
217 int mingw_core_config(const char *var, const char *value, void *cb)
218 {
219 if (!strcmp(var, "core.hidedotfiles")) {
220 if (value && !strcasecmp(value, "dotgitonly"))
221 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
222 else
223 hide_dotfiles = git_config_bool(var, value);
224 return 0;
225 }
226
227 if (!strcmp(var, "core.unsetenvvars")) {
228 free(unset_environment_variables);
229 unset_environment_variables = xstrdup(value);
230 return 0;
231 }
232
233 return 0;
234 }
235
236 /* Normalizes NT paths as returned by some low-level APIs. */
237 static wchar_t *normalize_ntpath(wchar_t *wbuf)
238 {
239 int i;
240 /* fix absolute path prefixes */
241 if (wbuf[0] == '\\') {
242 /* strip NT namespace prefixes */
243 if (!wcsncmp(wbuf, L"\\??\\", 4) ||
244 !wcsncmp(wbuf, L"\\\\?\\", 4))
245 wbuf += 4;
246 else if (!wcsnicmp(wbuf, L"\\DosDevices\\", 12))
247 wbuf += 12;
248 /* replace remaining '...UNC\' with '\\' */
249 if (!wcsnicmp(wbuf, L"UNC\\", 4)) {
250 wbuf += 2;
251 *wbuf = '\\';
252 }
253 }
254 /* convert backslashes to slashes */
255 for (i = 0; wbuf[i]; i++)
256 if (wbuf[i] == '\\')
257 wbuf[i] = '/';
258 return wbuf;
259 }
260
261 int mingw_unlink(const char *pathname)
262 {
263 int ret, tries = 0;
264 wchar_t wpathname[MAX_PATH];
265 if (xutftowcs_path(wpathname, pathname) < 0)
266 return -1;
267
268 /* read-only files cannot be removed */
269 _wchmod(wpathname, 0666);
270 while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
271 if (!is_file_in_use_error(GetLastError()))
272 break;
273 /*
274 * We assume that some other process had the source or
275 * destination file open at the wrong moment and retry.
276 * In order to give the other process a higher chance to
277 * complete its operation, we give up our time slice now.
278 * If we have to retry again, we do sleep a bit.
279 */
280 Sleep(delay[tries]);
281 tries++;
282 }
283 while (ret == -1 && is_file_in_use_error(GetLastError()) &&
284 ask_yes_no_if_possible("Unlink of file '%s' failed. "
285 "Should I try again?", pathname))
286 ret = _wunlink(wpathname);
287 return ret;
288 }
289
290 static int is_dir_empty(const wchar_t *wpath)
291 {
292 WIN32_FIND_DATAW findbuf;
293 HANDLE handle;
294 wchar_t wbuf[MAX_PATH + 2];
295 wcscpy(wbuf, wpath);
296 wcscat(wbuf, L"\\*");
297 handle = FindFirstFileW(wbuf, &findbuf);
298 if (handle == INVALID_HANDLE_VALUE)
299 return GetLastError() == ERROR_NO_MORE_FILES;
300
301 while (!wcscmp(findbuf.cFileName, L".") ||
302 !wcscmp(findbuf.cFileName, L".."))
303 if (!FindNextFileW(handle, &findbuf)) {
304 DWORD err = GetLastError();
305 FindClose(handle);
306 return err == ERROR_NO_MORE_FILES;
307 }
308 FindClose(handle);
309 return 0;
310 }
311
312 int mingw_rmdir(const char *pathname)
313 {
314 int ret, tries = 0;
315 wchar_t wpathname[MAX_PATH];
316 if (xutftowcs_path(wpathname, pathname) < 0)
317 return -1;
318
319 while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
320 if (!is_file_in_use_error(GetLastError()))
321 errno = err_win_to_posix(GetLastError());
322 if (errno != EACCES)
323 break;
324 if (!is_dir_empty(wpathname)) {
325 errno = ENOTEMPTY;
326 break;
327 }
328 /*
329 * We assume that some other process had the source or
330 * destination file open at the wrong moment and retry.
331 * In order to give the other process a higher chance to
332 * complete its operation, we give up our time slice now.
333 * If we have to retry again, we do sleep a bit.
334 */
335 Sleep(delay[tries]);
336 tries++;
337 }
338 while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
339 ask_yes_no_if_possible("Deletion of directory '%s' failed. "
340 "Should I try again?", pathname))
341 ret = _wrmdir(wpathname);
342 if (!ret)
343 invalidate_lstat_cache();
344 return ret;
345 }
346
347 static inline int needs_hiding(const char *path)
348 {
349 const char *basename;
350
351 if (hide_dotfiles == HIDE_DOTFILES_FALSE)
352 return 0;
353
354 /* We cannot use basename(), as it would remove trailing slashes */
355 mingw_skip_dos_drive_prefix((char **)&path);
356 if (!*path)
357 return 0;
358
359 for (basename = path; *path; path++)
360 if (is_dir_sep(*path)) {
361 do {
362 path++;
363 } while (is_dir_sep(*path));
364 /* ignore trailing slashes */
365 if (*path)
366 basename = path;
367 }
368
369 if (hide_dotfiles == HIDE_DOTFILES_TRUE)
370 return *basename == '.';
371
372 assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
373 return !strncasecmp(".git", basename, 4) &&
374 (!basename[4] || is_dir_sep(basename[4]));
375 }
376
377 static int set_hidden_flag(const wchar_t *path, int set)
378 {
379 DWORD original = GetFileAttributesW(path), modified;
380 if (set)
381 modified = original | FILE_ATTRIBUTE_HIDDEN;
382 else
383 modified = original & ~FILE_ATTRIBUTE_HIDDEN;
384 if (original == modified || SetFileAttributesW(path, modified))
385 return 0;
386 errno = err_win_to_posix(GetLastError());
387 return -1;
388 }
389
390 int mingw_mkdir(const char *path, int mode)
391 {
392 int ret;
393 wchar_t wpath[MAX_PATH];
394
395 if (!is_valid_win32_path(path)) {
396 errno = EINVAL;
397 return -1;
398 }
399
400 if (xutftowcs_path(wpath, path) < 0)
401 return -1;
402 ret = _wmkdir(wpath);
403 if (!ret && needs_hiding(path))
404 return set_hidden_flag(wpath, 1);
405 return ret;
406 }
407
408 /*
409 * Calling CreateFile() using FILE_APPEND_DATA and without FILE_WRITE_DATA
410 * is documented in [1] as opening a writable file handle in append mode.
411 * (It is believed that) this is atomic since it is maintained by the
412 * kernel unlike the O_APPEND flag which is racily maintained by the CRT.
413 *
414 * [1] https://docs.microsoft.com/en-us/windows/desktop/fileio/file-access-rights-constants
415 *
416 * This trick does not appear to work for named pipes. Instead it creates
417 * a named pipe client handle that cannot be written to. Callers should
418 * just use the regular _wopen() for them. (And since client handle gets
419 * bound to a unique server handle, it isn't really an issue.)
420 */
421 static int mingw_open_append(wchar_t const *wfilename, int oflags, ...)
422 {
423 HANDLE handle;
424 int fd;
425 DWORD create = (oflags & O_CREAT) ? OPEN_ALWAYS : OPEN_EXISTING;
426
427 /* only these flags are supported */
428 if ((oflags & ~O_CREAT) != (O_WRONLY | O_APPEND))
429 return errno = ENOSYS, -1;
430
431 /*
432 * FILE_SHARE_WRITE is required to permit child processes
433 * to append to the file.
434 */
435 handle = CreateFileW(wfilename, FILE_APPEND_DATA,
436 FILE_SHARE_WRITE | FILE_SHARE_READ,
437 NULL, create, FILE_ATTRIBUTE_NORMAL, NULL);
438 if (handle == INVALID_HANDLE_VALUE)
439 return errno = err_win_to_posix(GetLastError()), -1;
440
441 /*
442 * No O_APPEND here, because the CRT uses it only to reset the
443 * file pointer to EOF before each write(); but that is not
444 * necessary (and may lead to races) for a file created with
445 * FILE_APPEND_DATA.
446 */
447 fd = _open_osfhandle((intptr_t)handle, O_BINARY);
448 if (fd < 0)
449 CloseHandle(handle);
450 return fd;
451 }
452
453 /*
454 * Does the pathname map to the local named pipe filesystem?
455 * That is, does it have a "//./pipe/" prefix?
456 */
457 static int is_local_named_pipe_path(const char *filename)
458 {
459 return (is_dir_sep(filename[0]) &&
460 is_dir_sep(filename[1]) &&
461 filename[2] == '.' &&
462 is_dir_sep(filename[3]) &&
463 !strncasecmp(filename+4, "pipe", 4) &&
464 is_dir_sep(filename[8]) &&
465 filename[9]);
466 }
467
468 int mingw_open (const char *filename, int oflags, ...)
469 {
470 typedef int (*open_fn_t)(wchar_t const *wfilename, int oflags, ...);
471 va_list args;
472 unsigned mode;
473 int fd, create = (oflags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL);
474 wchar_t wfilename[MAX_PATH];
475 open_fn_t open_fn;
476
477 va_start(args, oflags);
478 mode = va_arg(args, int);
479 va_end(args);
480
481 if (!is_valid_win32_path(filename)) {
482 errno = create ? EINVAL : ENOENT;
483 return -1;
484 }
485
486 if (filename && !strcmp(filename, "/dev/null"))
487 filename = "nul";
488
489 if ((oflags & O_APPEND) && !is_local_named_pipe_path(filename))
490 open_fn = mingw_open_append;
491 else
492 open_fn = _wopen;
493
494 if (xutftowcs_path(wfilename, filename) < 0)
495 return -1;
496 fd = open_fn(wfilename, oflags, mode);
497
498 if (fd < 0 && (oflags & O_ACCMODE) != O_RDONLY && errno == EACCES) {
499 DWORD attrs = GetFileAttributesW(wfilename);
500 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
501 errno = EISDIR;
502 }
503 if ((oflags & O_CREAT) && needs_hiding(filename)) {
504 /*
505 * Internally, _wopen() uses the CreateFile() API which errors
506 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
507 * specified and an already existing file's attributes do not
508 * match *exactly*. As there is no mode or flag we can set that
509 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
510 * again *without* the O_CREAT flag (that corresponds to the
511 * CREATE_ALWAYS flag of CreateFile()).
512 */
513 if (fd < 0 && errno == EACCES)
514 fd = open_fn(wfilename, oflags & ~O_CREAT, mode);
515 if (fd >= 0 && set_hidden_flag(wfilename, 1))
516 warning("could not mark '%s' as hidden.", filename);
517 }
518 return fd;
519 }
520
521 static BOOL WINAPI ctrl_ignore(DWORD type)
522 {
523 return TRUE;
524 }
525
526 #undef fgetc
527 int mingw_fgetc(FILE *stream)
528 {
529 int ch;
530 if (!isatty(_fileno(stream)))
531 return fgetc(stream);
532
533 SetConsoleCtrlHandler(ctrl_ignore, TRUE);
534 while (1) {
535 ch = fgetc(stream);
536 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
537 break;
538
539 /* Ctrl+C was pressed, simulate SIGINT and retry */
540 mingw_raise(SIGINT);
541 }
542 SetConsoleCtrlHandler(ctrl_ignore, FALSE);
543 return ch;
544 }
545
546 #undef fopen
547 FILE *mingw_fopen (const char *filename, const char *otype)
548 {
549 int hide = needs_hiding(filename);
550 FILE *file;
551 wchar_t wfilename[MAX_PATH], wotype[4];
552 if (!is_valid_win32_path(filename)) {
553 int create = otype && strchr(otype, 'w');
554 errno = create ? EINVAL : ENOENT;
555 return NULL;
556 }
557 if (filename && !strcmp(filename, "/dev/null"))
558 filename = "nul";
559 if (xutftowcs_path(wfilename, filename) < 0 ||
560 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
561 return NULL;
562 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
563 error("could not unhide %s", filename);
564 return NULL;
565 }
566 file = _wfopen(wfilename, wotype);
567 if (!file && GetLastError() == ERROR_INVALID_NAME)
568 errno = ENOENT;
569 if (file && hide && set_hidden_flag(wfilename, 1))
570 warning("could not mark '%s' as hidden.", filename);
571 return file;
572 }
573
574 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
575 {
576 int hide = needs_hiding(filename);
577 FILE *file;
578 wchar_t wfilename[MAX_PATH], wotype[4];
579 if (!is_valid_win32_path(filename)) {
580 int create = otype && strchr(otype, 'w');
581 errno = create ? EINVAL : ENOENT;
582 return NULL;
583 }
584 if (filename && !strcmp(filename, "/dev/null"))
585 filename = "nul";
586 if (xutftowcs_path(wfilename, filename) < 0 ||
587 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
588 return NULL;
589 if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
590 error("could not unhide %s", filename);
591 return NULL;
592 }
593 file = _wfreopen(wfilename, wotype, stream);
594 if (file && hide && set_hidden_flag(wfilename, 1))
595 warning("could not mark '%s' as hidden.", filename);
596 return file;
597 }
598
599 #undef fflush
600 int mingw_fflush(FILE *stream)
601 {
602 int ret = fflush(stream);
603
604 /*
605 * write() is used behind the scenes of stdio output functions.
606 * Since git code does not check for errors after each stdio write
607 * operation, it can happen that write() is called by a later
608 * stdio function even if an earlier write() call failed. In the
609 * case of a pipe whose readable end was closed, only the first
610 * call to write() reports EPIPE on Windows. Subsequent write()
611 * calls report EINVAL. It is impossible to notice whether this
612 * fflush invocation triggered such a case, therefore, we have to
613 * catch all EINVAL errors whole-sale.
614 */
615 if (ret && errno == EINVAL)
616 errno = EPIPE;
617
618 return ret;
619 }
620
621 #undef write
622 ssize_t mingw_write(int fd, const void *buf, size_t len)
623 {
624 ssize_t result = write(fd, buf, len);
625
626 if (result < 0 && errno == EINVAL && buf) {
627 /* check if fd is a pipe */
628 HANDLE h = (HANDLE) _get_osfhandle(fd);
629 if (GetFileType(h) == FILE_TYPE_PIPE)
630 errno = EPIPE;
631 else
632 errno = EINVAL;
633 }
634
635 return result;
636 }
637
638 int mingw_access(const char *filename, int mode)
639 {
640 wchar_t wfilename[MAX_PATH];
641 if (xutftowcs_path(wfilename, filename) < 0)
642 return -1;
643 /* X_OK is not supported by the MSVCRT version */
644 return _waccess(wfilename, mode & ~X_OK);
645 }
646
647 int mingw_chdir(const char *dirname)
648 {
649 wchar_t wdirname[MAX_PATH];
650 if (xutftowcs_path(wdirname, dirname) < 0)
651 return -1;
652 return _wchdir(wdirname);
653 }
654
655 int mingw_chmod(const char *filename, int mode)
656 {
657 wchar_t wfilename[MAX_PATH];
658 if (xutftowcs_path(wfilename, filename) < 0)
659 return -1;
660 return _wchmod(wfilename, mode);
661 }
662
663 /*
664 * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
665 * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
666 */
667 static inline long long filetime_to_hnsec(const FILETIME *ft)
668 {
669 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
670 /* Windows to Unix Epoch conversion */
671 return winTime - 116444736000000000LL;
672 }
673
674 static inline void filetime_to_timespec(const FILETIME *ft, struct timespec *ts)
675 {
676 long long hnsec = filetime_to_hnsec(ft);
677 ts->tv_sec = (time_t)(hnsec / 10000000);
678 ts->tv_nsec = (hnsec % 10000000) * 100;
679 }
680
681 /**
682 * Verifies that safe_create_leading_directories() would succeed.
683 */
684 static int has_valid_directory_prefix(wchar_t *wfilename)
685 {
686 int n = wcslen(wfilename);
687
688 while (n > 0) {
689 wchar_t c = wfilename[--n];
690 DWORD attributes;
691
692 if (!is_dir_sep(c))
693 continue;
694
695 wfilename[n] = L'\0';
696 attributes = GetFileAttributesW(wfilename);
697 wfilename[n] = c;
698 if (attributes == FILE_ATTRIBUTE_DIRECTORY ||
699 attributes == FILE_ATTRIBUTE_DEVICE)
700 return 1;
701 if (attributes == INVALID_FILE_ATTRIBUTES)
702 switch (GetLastError()) {
703 case ERROR_PATH_NOT_FOUND:
704 continue;
705 case ERROR_FILE_NOT_FOUND:
706 /* This implies parent directory exists. */
707 return 1;
708 }
709 return 0;
710 }
711 return 1;
712 }
713
714 /* We keep the do_lstat code in a separate function to avoid recursion.
715 * When a path ends with a slash, the stat will fail with ENOENT. In
716 * this case, we strip the trailing slashes and stat again.
717 *
718 * If follow is true then act like stat() and report on the link
719 * target. Otherwise report on the link itself.
720 */
721 static int do_lstat(int follow, const char *file_name, struct stat *buf)
722 {
723 WIN32_FILE_ATTRIBUTE_DATA fdata;
724 wchar_t wfilename[MAX_PATH];
725 if (xutftowcs_path(wfilename, file_name) < 0)
726 return -1;
727
728 if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
729 buf->st_ino = 0;
730 buf->st_gid = 0;
731 buf->st_uid = 0;
732 buf->st_nlink = 1;
733 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
734 buf->st_size = fdata.nFileSizeLow |
735 (((off_t)fdata.nFileSizeHigh)<<32);
736 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
737 filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
738 filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
739 filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
740 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
741 WIN32_FIND_DATAW findbuf;
742 HANDLE handle = FindFirstFileW(wfilename, &findbuf);
743 if (handle != INVALID_HANDLE_VALUE) {
744 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
745 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
746 if (follow) {
747 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
748 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
749 } else {
750 buf->st_mode = S_IFLNK;
751 }
752 buf->st_mode |= S_IREAD;
753 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
754 buf->st_mode |= S_IWRITE;
755 }
756 FindClose(handle);
757 }
758 }
759 return 0;
760 }
761 switch (GetLastError()) {
762 case ERROR_ACCESS_DENIED:
763 case ERROR_SHARING_VIOLATION:
764 case ERROR_LOCK_VIOLATION:
765 case ERROR_SHARING_BUFFER_EXCEEDED:
766 errno = EACCES;
767 break;
768 case ERROR_BUFFER_OVERFLOW:
769 errno = ENAMETOOLONG;
770 break;
771 case ERROR_NOT_ENOUGH_MEMORY:
772 errno = ENOMEM;
773 break;
774 case ERROR_PATH_NOT_FOUND:
775 if (!has_valid_directory_prefix(wfilename)) {
776 errno = ENOTDIR;
777 break;
778 }
779 /* fallthru */
780 default:
781 errno = ENOENT;
782 break;
783 }
784 return -1;
785 }
786
787 /* We provide our own lstat/fstat functions, since the provided
788 * lstat/fstat functions are so slow. These stat functions are
789 * tailored for Git's usage (read: fast), and are not meant to be
790 * complete. Note that Git stat()s are redirected to mingw_lstat()
791 * too, since Windows doesn't really handle symlinks that well.
792 */
793 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
794 {
795 int namelen;
796 char alt_name[PATH_MAX];
797
798 if (!do_lstat(follow, file_name, buf))
799 return 0;
800
801 /* if file_name ended in a '/', Windows returned ENOENT;
802 * try again without trailing slashes
803 */
804 if (errno != ENOENT)
805 return -1;
806
807 namelen = strlen(file_name);
808 if (namelen && file_name[namelen-1] != '/')
809 return -1;
810 while (namelen && file_name[namelen-1] == '/')
811 --namelen;
812 if (!namelen || namelen >= PATH_MAX)
813 return -1;
814
815 memcpy(alt_name, file_name, namelen);
816 alt_name[namelen] = 0;
817 return do_lstat(follow, alt_name, buf);
818 }
819
820 static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
821 {
822 BY_HANDLE_FILE_INFORMATION fdata;
823
824 if (!GetFileInformationByHandle(hnd, &fdata)) {
825 errno = err_win_to_posix(GetLastError());
826 return -1;
827 }
828
829 buf->st_ino = 0;
830 buf->st_gid = 0;
831 buf->st_uid = 0;
832 buf->st_nlink = 1;
833 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
834 buf->st_size = fdata.nFileSizeLow |
835 (((off_t)fdata.nFileSizeHigh)<<32);
836 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
837 filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
838 filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
839 filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
840 return 0;
841 }
842
843 int mingw_lstat(const char *file_name, struct stat *buf)
844 {
845 return do_stat_internal(0, file_name, buf);
846 }
847 int mingw_stat(const char *file_name, struct stat *buf)
848 {
849 return do_stat_internal(1, file_name, buf);
850 }
851
852 int mingw_fstat(int fd, struct stat *buf)
853 {
854 HANDLE fh = (HANDLE)_get_osfhandle(fd);
855 DWORD avail, type = GetFileType(fh) & ~FILE_TYPE_REMOTE;
856
857 switch (type) {
858 case FILE_TYPE_DISK:
859 return get_file_info_by_handle(fh, buf);
860
861 case FILE_TYPE_CHAR:
862 case FILE_TYPE_PIPE:
863 /* initialize stat fields */
864 memset(buf, 0, sizeof(*buf));
865 buf->st_nlink = 1;
866
867 if (type == FILE_TYPE_CHAR) {
868 buf->st_mode = _S_IFCHR;
869 } else {
870 buf->st_mode = _S_IFIFO;
871 if (PeekNamedPipe(fh, NULL, 0, NULL, &avail, NULL))
872 buf->st_size = avail;
873 }
874 return 0;
875
876 default:
877 errno = EBADF;
878 return -1;
879 }
880 }
881
882 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
883 {
884 long long winTime = t * 10000000LL + 116444736000000000LL;
885 ft->dwLowDateTime = winTime;
886 ft->dwHighDateTime = winTime >> 32;
887 }
888
889 int mingw_utime (const char *file_name, const struct utimbuf *times)
890 {
891 FILETIME mft, aft;
892 int fh, rc;
893 DWORD attrs;
894 wchar_t wfilename[MAX_PATH];
895 if (xutftowcs_path(wfilename, file_name) < 0)
896 return -1;
897
898 /* must have write permission */
899 attrs = GetFileAttributesW(wfilename);
900 if (attrs != INVALID_FILE_ATTRIBUTES &&
901 (attrs & FILE_ATTRIBUTE_READONLY)) {
902 /* ignore errors here; open() will report them */
903 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
904 }
905
906 if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
907 rc = -1;
908 goto revert_attrs;
909 }
910
911 if (times) {
912 time_t_to_filetime(times->modtime, &mft);
913 time_t_to_filetime(times->actime, &aft);
914 } else {
915 GetSystemTimeAsFileTime(&mft);
916 aft = mft;
917 }
918 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
919 errno = EINVAL;
920 rc = -1;
921 } else
922 rc = 0;
923 close(fh);
924
925 revert_attrs:
926 if (attrs != INVALID_FILE_ATTRIBUTES &&
927 (attrs & FILE_ATTRIBUTE_READONLY)) {
928 /* ignore errors again */
929 SetFileAttributesW(wfilename, attrs);
930 }
931 return rc;
932 }
933
934 #undef strftime
935 size_t mingw_strftime(char *s, size_t max,
936 const char *format, const struct tm *tm)
937 {
938 size_t ret = strftime(s, max, format, tm);
939
940 if (!ret && errno == EINVAL)
941 die("invalid strftime format: '%s'", format);
942 return ret;
943 }
944
945 unsigned int sleep (unsigned int seconds)
946 {
947 Sleep(seconds*1000);
948 return 0;
949 }
950
951 char *mingw_mktemp(char *template)
952 {
953 wchar_t wtemplate[MAX_PATH];
954 if (xutftowcs_path(wtemplate, template) < 0)
955 return NULL;
956 if (!_wmktemp(wtemplate))
957 return NULL;
958 if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
959 return NULL;
960 return template;
961 }
962
963 int mkstemp(char *template)
964 {
965 char *filename = mktemp(template);
966 if (filename == NULL)
967 return -1;
968 return open(filename, O_RDWR | O_CREAT, 0600);
969 }
970
971 int gettimeofday(struct timeval *tv, void *tz)
972 {
973 FILETIME ft;
974 long long hnsec;
975
976 GetSystemTimeAsFileTime(&ft);
977 hnsec = filetime_to_hnsec(&ft);
978 tv->tv_sec = hnsec / 10000000;
979 tv->tv_usec = (hnsec % 10000000) / 10;
980 return 0;
981 }
982
983 int pipe(int filedes[2])
984 {
985 HANDLE h[2];
986
987 /* this creates non-inheritable handles */
988 if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
989 errno = err_win_to_posix(GetLastError());
990 return -1;
991 }
992 filedes[0] = _open_osfhandle(HCAST(int, h[0]), O_NOINHERIT);
993 if (filedes[0] < 0) {
994 CloseHandle(h[0]);
995 CloseHandle(h[1]);
996 return -1;
997 }
998 filedes[1] = _open_osfhandle(HCAST(int, h[1]), O_NOINHERIT);
999 if (filedes[1] < 0) {
1000 close(filedes[0]);
1001 CloseHandle(h[1]);
1002 return -1;
1003 }
1004 return 0;
1005 }
1006
1007 struct tm *gmtime_r(const time_t *timep, struct tm *result)
1008 {
1009 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
1010 memcpy(result, gmtime(timep), sizeof(struct tm));
1011 return result;
1012 }
1013
1014 struct tm *localtime_r(const time_t *timep, struct tm *result)
1015 {
1016 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
1017 memcpy(result, localtime(timep), sizeof(struct tm));
1018 return result;
1019 }
1020
1021 char *mingw_getcwd(char *pointer, int len)
1022 {
1023 wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
1024 DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
1025
1026 if (!ret || ret >= ARRAY_SIZE(cwd)) {
1027 errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
1028 return NULL;
1029 }
1030 ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
1031 if (!ret && GetLastError() == ERROR_ACCESS_DENIED) {
1032 HANDLE hnd = CreateFileW(cwd, 0,
1033 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
1034 OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
1035 if (hnd == INVALID_HANDLE_VALUE)
1036 return NULL;
1037 ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
1038 CloseHandle(hnd);
1039 if (!ret || ret >= ARRAY_SIZE(wpointer))
1040 return NULL;
1041 if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
1042 return NULL;
1043 return pointer;
1044 }
1045 if (!ret || ret >= ARRAY_SIZE(wpointer))
1046 return NULL;
1047 if (xwcstoutf(pointer, wpointer, len) < 0)
1048 return NULL;
1049 convert_slashes(pointer);
1050 return pointer;
1051 }
1052
1053 /*
1054 * See "Parsing C++ Command-Line Arguments" at Microsoft's Docs:
1055 * https://docs.microsoft.com/en-us/cpp/cpp/parsing-cpp-command-line-arguments
1056 */
1057 static const char *quote_arg(const char *arg)
1058 {
1059 /* count chars to quote */
1060 int len = 0, n = 0;
1061 int force_quotes = 0;
1062 char *q, *d;
1063 const char *p = arg;
1064 if (!*p) force_quotes = 1;
1065 while (*p) {
1066 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
1067 force_quotes = 1;
1068 else if (*p == '"')
1069 n++;
1070 else if (*p == '\\') {
1071 int count = 0;
1072 while (*p == '\\') {
1073 count++;
1074 p++;
1075 len++;
1076 }
1077 if (*p == '"' || !*p)
1078 n += count*2 + 1;
1079 continue;
1080 }
1081 len++;
1082 p++;
1083 }
1084 if (!force_quotes && n == 0)
1085 return arg;
1086
1087 /* insert \ where necessary */
1088 d = q = xmalloc(st_add3(len, n, 3));
1089 *d++ = '"';
1090 while (*arg) {
1091 if (*arg == '"')
1092 *d++ = '\\';
1093 else if (*arg == '\\') {
1094 int count = 0;
1095 while (*arg == '\\') {
1096 count++;
1097 *d++ = *arg++;
1098 }
1099 if (*arg == '"' || !*arg) {
1100 while (count-- > 0)
1101 *d++ = '\\';
1102 /* don't escape the surrounding end quote */
1103 if (!*arg)
1104 break;
1105 *d++ = '\\';
1106 }
1107 }
1108 *d++ = *arg++;
1109 }
1110 *d++ = '"';
1111 *d++ = '\0';
1112 return q;
1113 }
1114
1115 static const char *parse_interpreter(const char *cmd)
1116 {
1117 static char buf[100];
1118 char *p, *opt;
1119 int n, fd;
1120
1121 /* don't even try a .exe */
1122 n = strlen(cmd);
1123 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
1124 return NULL;
1125
1126 fd = open(cmd, O_RDONLY);
1127 if (fd < 0)
1128 return NULL;
1129 n = read(fd, buf, sizeof(buf)-1);
1130 close(fd);
1131 if (n < 4) /* at least '#!/x' and not error */
1132 return NULL;
1133
1134 if (buf[0] != '#' || buf[1] != '!')
1135 return NULL;
1136 buf[n] = '\0';
1137 p = buf + strcspn(buf, "\r\n");
1138 if (!*p)
1139 return NULL;
1140
1141 *p = '\0';
1142 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
1143 return NULL;
1144 /* strip options */
1145 if ((opt = strchr(p+1, ' ')))
1146 *opt = '\0';
1147 return p+1;
1148 }
1149
1150 /*
1151 * exe_only means that we only want to detect .exe files, but not scripts
1152 * (which do not have an extension)
1153 */
1154 static char *lookup_prog(const char *dir, int dirlen, const char *cmd,
1155 int isexe, int exe_only)
1156 {
1157 char path[MAX_PATH];
1158 snprintf(path, sizeof(path), "%.*s\\%s.exe", dirlen, dir, cmd);
1159
1160 if (!isexe && access(path, F_OK) == 0)
1161 return xstrdup(path);
1162 path[strlen(path)-4] = '\0';
1163 if ((!exe_only || isexe) && access(path, F_OK) == 0)
1164 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
1165 return xstrdup(path);
1166 return NULL;
1167 }
1168
1169 /*
1170 * Determines the absolute path of cmd using the split path in path.
1171 * If cmd contains a slash or backslash, no lookup is performed.
1172 */
1173 static char *path_lookup(const char *cmd, int exe_only)
1174 {
1175 const char *path;
1176 char *prog = NULL;
1177 int len = strlen(cmd);
1178 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1179
1180 if (strchr(cmd, '/') || strchr(cmd, '\\'))
1181 return xstrdup(cmd);
1182
1183 path = mingw_getenv("PATH");
1184 if (!path)
1185 return NULL;
1186
1187 while (!prog) {
1188 const char *sep = strchrnul(path, ';');
1189 int dirlen = sep - path;
1190 if (dirlen)
1191 prog = lookup_prog(path, dirlen, cmd, isexe, exe_only);
1192 if (!*sep)
1193 break;
1194 path = sep + 1;
1195 }
1196
1197 return prog;
1198 }
1199
1200 static const wchar_t *wcschrnul(const wchar_t *s, wchar_t c)
1201 {
1202 while (*s && *s != c)
1203 s++;
1204 return s;
1205 }
1206
1207 /* Compare only keys */
1208 static int wenvcmp(const void *a, const void *b)
1209 {
1210 wchar_t *p = *(wchar_t **)a, *q = *(wchar_t **)b;
1211 size_t p_len, q_len;
1212
1213 /* Find the keys */
1214 p_len = wcschrnul(p, L'=') - p;
1215 q_len = wcschrnul(q, L'=') - q;
1216
1217 /* If the length differs, include the shorter key's NUL */
1218 if (p_len < q_len)
1219 p_len++;
1220 else if (p_len > q_len)
1221 p_len = q_len + 1;
1222
1223 return _wcsnicmp(p, q, p_len);
1224 }
1225
1226 /* We need a stable sort to convert the environment between UTF-16 <-> UTF-8 */
1227 #ifndef INTERNAL_QSORT
1228 #include "qsort.c"
1229 #endif
1230
1231 /*
1232 * Build an environment block combining the inherited environment
1233 * merged with the given list of settings.
1234 *
1235 * Values of the form "KEY=VALUE" in deltaenv override inherited values.
1236 * Values of the form "KEY" in deltaenv delete inherited values.
1237 *
1238 * Multiple entries in deltaenv for the same key are explicitly allowed.
1239 *
1240 * We return a contiguous block of UNICODE strings with a final trailing
1241 * zero word.
1242 */
1243 static wchar_t *make_environment_block(char **deltaenv)
1244 {
1245 wchar_t *wenv = GetEnvironmentStringsW(), *wdeltaenv, *result, *p;
1246 size_t wlen, s, delta_size, size;
1247
1248 wchar_t **array = NULL;
1249 size_t alloc = 0, nr = 0, i;
1250
1251 size = 1; /* for extra NUL at the end */
1252
1253 /* If there is no deltaenv to apply, simply return a copy. */
1254 if (!deltaenv || !*deltaenv) {
1255 for (p = wenv; p && *p; ) {
1256 size_t s = wcslen(p) + 1;
1257 size += s;
1258 p += s;
1259 }
1260
1261 ALLOC_ARRAY(result, size);
1262 memcpy(result, wenv, size * sizeof(*wenv));
1263 FreeEnvironmentStringsW(wenv);
1264 return result;
1265 }
1266
1267 /*
1268 * If there is a deltaenv, let's accumulate all keys into `array`,
1269 * sort them using the stable git_qsort() and then copy, skipping
1270 * duplicate keys
1271 */
1272 for (p = wenv; p && *p; ) {
1273 ALLOC_GROW(array, nr + 1, alloc);
1274 s = wcslen(p) + 1;
1275 array[nr++] = p;
1276 p += s;
1277 size += s;
1278 }
1279
1280 /* (over-)assess size needed for wchar version of deltaenv */
1281 for (delta_size = 0, i = 0; deltaenv[i]; i++)
1282 delta_size += strlen(deltaenv[i]) * 2 + 1;
1283 ALLOC_ARRAY(wdeltaenv, delta_size);
1284
1285 /* convert the deltaenv, appending to array */
1286 for (i = 0, p = wdeltaenv; deltaenv[i]; i++) {
1287 ALLOC_GROW(array, nr + 1, alloc);
1288 wlen = xutftowcs(p, deltaenv[i], wdeltaenv + delta_size - p);
1289 array[nr++] = p;
1290 p += wlen + 1;
1291 }
1292
1293 git_qsort(array, nr, sizeof(*array), wenvcmp);
1294 ALLOC_ARRAY(result, size + delta_size);
1295
1296 for (p = result, i = 0; i < nr; i++) {
1297 /* Skip any duplicate keys; last one wins */
1298 while (i + 1 < nr && !wenvcmp(array + i, array + i + 1))
1299 i++;
1300
1301 /* Skip "to delete" entry */
1302 if (!wcschr(array[i], L'='))
1303 continue;
1304
1305 size = wcslen(array[i]) + 1;
1306 memcpy(p, array[i], size * sizeof(*p));
1307 p += size;
1308 }
1309 *p = L'\0';
1310
1311 free(array);
1312 free(wdeltaenv);
1313 FreeEnvironmentStringsW(wenv);
1314 return result;
1315 }
1316
1317 static void do_unset_environment_variables(void)
1318 {
1319 static int done;
1320 char *p = unset_environment_variables;
1321
1322 if (done || !p)
1323 return;
1324 done = 1;
1325
1326 for (;;) {
1327 char *comma = strchr(p, ',');
1328
1329 if (comma)
1330 *comma = '\0';
1331 unsetenv(p);
1332 if (!comma)
1333 break;
1334 p = comma + 1;
1335 }
1336 }
1337
1338 struct pinfo_t {
1339 struct pinfo_t *next;
1340 pid_t pid;
1341 HANDLE proc;
1342 };
1343 static struct pinfo_t *pinfo = NULL;
1344 CRITICAL_SECTION pinfo_cs;
1345
1346 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1347 const char *dir,
1348 int prepend_cmd, int fhin, int fhout, int fherr)
1349 {
1350 STARTUPINFOW si;
1351 PROCESS_INFORMATION pi;
1352 struct strbuf args;
1353 wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1354 unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1355 BOOL ret;
1356 HANDLE cons;
1357
1358 do_unset_environment_variables();
1359
1360 /* Determine whether or not we are associated to a console */
1361 cons = CreateFile("CONOUT$", GENERIC_WRITE,
1362 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1363 FILE_ATTRIBUTE_NORMAL, NULL);
1364 if (cons == INVALID_HANDLE_VALUE) {
1365 /* There is no console associated with this process.
1366 * Since the child is a console process, Windows
1367 * would normally create a console window. But
1368 * since we'll be redirecting std streams, we do
1369 * not need the console.
1370 * It is necessary to use DETACHED_PROCESS
1371 * instead of CREATE_NO_WINDOW to make ssh
1372 * recognize that it has no console.
1373 */
1374 flags |= DETACHED_PROCESS;
1375 } else {
1376 /* There is already a console. If we specified
1377 * DETACHED_PROCESS here, too, Windows would
1378 * disassociate the child from the console.
1379 * The same is true for CREATE_NO_WINDOW.
1380 * Go figure!
1381 */
1382 CloseHandle(cons);
1383 }
1384 memset(&si, 0, sizeof(si));
1385 si.cb = sizeof(si);
1386 si.dwFlags = STARTF_USESTDHANDLES;
1387 si.hStdInput = winansi_get_osfhandle(fhin);
1388 si.hStdOutput = winansi_get_osfhandle(fhout);
1389 si.hStdError = winansi_get_osfhandle(fherr);
1390
1391 if (xutftowcs_path(wcmd, cmd) < 0)
1392 return -1;
1393 if (dir && xutftowcs_path(wdir, dir) < 0)
1394 return -1;
1395
1396 /* concatenate argv, quoting args as we go */
1397 strbuf_init(&args, 0);
1398 if (prepend_cmd) {
1399 char *quoted = (char *)quote_arg(cmd);
1400 strbuf_addstr(&args, quoted);
1401 if (quoted != cmd)
1402 free(quoted);
1403 }
1404 for (; *argv; argv++) {
1405 char *quoted = (char *)quote_arg(*argv);
1406 if (*args.buf)
1407 strbuf_addch(&args, ' ');
1408 strbuf_addstr(&args, quoted);
1409 if (quoted != *argv)
1410 free(quoted);
1411 }
1412
1413 ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
1414 xutftowcs(wargs, args.buf, 2 * args.len + 1);
1415 strbuf_release(&args);
1416
1417 wenvblk = make_environment_block(deltaenv);
1418
1419 memset(&pi, 0, sizeof(pi));
1420 ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1421 wenvblk, dir ? wdir : NULL, &si, &pi);
1422
1423 free(wenvblk);
1424 free(wargs);
1425
1426 if (!ret) {
1427 errno = ENOENT;
1428 return -1;
1429 }
1430 CloseHandle(pi.hThread);
1431
1432 /*
1433 * The process ID is the human-readable identifier of the process
1434 * that we want to present in log and error messages. The handle
1435 * is not useful for this purpose. But we cannot close it, either,
1436 * because it is not possible to turn a process ID into a process
1437 * handle after the process terminated.
1438 * Keep the handle in a list for waitpid.
1439 */
1440 EnterCriticalSection(&pinfo_cs);
1441 {
1442 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1443 info->pid = pi.dwProcessId;
1444 info->proc = pi.hProcess;
1445 info->next = pinfo;
1446 pinfo = info;
1447 }
1448 LeaveCriticalSection(&pinfo_cs);
1449
1450 return (pid_t)pi.dwProcessId;
1451 }
1452
1453 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1454 {
1455 return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1456 }
1457
1458 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1459 const char *dir,
1460 int fhin, int fhout, int fherr)
1461 {
1462 pid_t pid;
1463 char *prog = path_lookup(cmd, 0);
1464
1465 if (!prog) {
1466 errno = ENOENT;
1467 pid = -1;
1468 }
1469 else {
1470 const char *interpr = parse_interpreter(prog);
1471
1472 if (interpr) {
1473 const char *argv0 = argv[0];
1474 char *iprog = path_lookup(interpr, 1);
1475 argv[0] = prog;
1476 if (!iprog) {
1477 errno = ENOENT;
1478 pid = -1;
1479 }
1480 else {
1481 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1482 fhin, fhout, fherr);
1483 free(iprog);
1484 }
1485 argv[0] = argv0;
1486 }
1487 else
1488 pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1489 fhin, fhout, fherr);
1490 free(prog);
1491 }
1492 return pid;
1493 }
1494
1495 static int try_shell_exec(const char *cmd, char *const *argv)
1496 {
1497 const char *interpr = parse_interpreter(cmd);
1498 char *prog;
1499 int pid = 0;
1500
1501 if (!interpr)
1502 return 0;
1503 prog = path_lookup(interpr, 1);
1504 if (prog) {
1505 int argc = 0;
1506 const char **argv2;
1507 while (argv[argc]) argc++;
1508 ALLOC_ARRAY(argv2, argc + 1);
1509 argv2[0] = (char *)cmd; /* full path to the script file */
1510 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1511 pid = mingw_spawnv(prog, argv2, 1);
1512 if (pid >= 0) {
1513 int status;
1514 if (waitpid(pid, &status, 0) < 0)
1515 status = 255;
1516 exit(status);
1517 }
1518 pid = 1; /* indicate that we tried but failed */
1519 free(prog);
1520 free(argv2);
1521 }
1522 return pid;
1523 }
1524
1525 int mingw_execv(const char *cmd, char *const *argv)
1526 {
1527 /* check if git_command is a shell script */
1528 if (!try_shell_exec(cmd, argv)) {
1529 int pid, status;
1530
1531 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1532 if (pid < 0)
1533 return -1;
1534 if (waitpid(pid, &status, 0) < 0)
1535 status = 255;
1536 exit(status);
1537 }
1538 return -1;
1539 }
1540
1541 int mingw_execvp(const char *cmd, char *const *argv)
1542 {
1543 char *prog = path_lookup(cmd, 0);
1544
1545 if (prog) {
1546 mingw_execv(prog, argv);
1547 free(prog);
1548 } else
1549 errno = ENOENT;
1550
1551 return -1;
1552 }
1553
1554 int mingw_kill(pid_t pid, int sig)
1555 {
1556 if (pid > 0 && sig == SIGTERM) {
1557 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1558
1559 if (TerminateProcess(h, -1)) {
1560 CloseHandle(h);
1561 return 0;
1562 }
1563
1564 errno = err_win_to_posix(GetLastError());
1565 CloseHandle(h);
1566 return -1;
1567 } else if (pid > 0 && sig == 0) {
1568 HANDLE h = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
1569 if (h) {
1570 CloseHandle(h);
1571 return 0;
1572 }
1573 }
1574
1575 errno = EINVAL;
1576 return -1;
1577 }
1578
1579 /*
1580 * UTF-8 versions of getenv(), putenv() and unsetenv().
1581 * Internally, they use the CRT's stock UNICODE routines
1582 * to avoid data loss.
1583 */
1584 char *mingw_getenv(const char *name)
1585 {
1586 #define GETENV_MAX_RETAIN 30
1587 static char *values[GETENV_MAX_RETAIN];
1588 static int value_counter;
1589 int len_key, len_value;
1590 wchar_t *w_key;
1591 char *value;
1592 wchar_t w_value[32768];
1593
1594 if (!name || !*name)
1595 return NULL;
1596
1597 len_key = strlen(name) + 1;
1598 /* We cannot use xcalloc() here because that uses getenv() itself */
1599 w_key = calloc(len_key, sizeof(wchar_t));
1600 if (!w_key)
1601 die("Out of memory, (tried to allocate %u wchar_t's)", len_key);
1602 xutftowcs(w_key, name, len_key);
1603 len_value = GetEnvironmentVariableW(w_key, w_value, ARRAY_SIZE(w_value));
1604 if (!len_value && GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
1605 free(w_key);
1606 return NULL;
1607 }
1608 free(w_key);
1609
1610 len_value = len_value * 3 + 1;
1611 /* We cannot use xcalloc() here because that uses getenv() itself */
1612 value = calloc(len_value, sizeof(char));
1613 if (!value)
1614 die("Out of memory, (tried to allocate %u bytes)", len_value);
1615 xwcstoutf(value, w_value, len_value);
1616
1617 /*
1618 * We return `value` which is an allocated value and the caller is NOT
1619 * expecting to have to free it, so we keep a round-robin array,
1620 * invalidating the buffer after GETENV_MAX_RETAIN getenv() calls.
1621 */
1622 free(values[value_counter]);
1623 values[value_counter++] = value;
1624 if (value_counter >= ARRAY_SIZE(values))
1625 value_counter = 0;
1626
1627 return value;
1628 }
1629
1630 int mingw_putenv(const char *namevalue)
1631 {
1632 int size;
1633 wchar_t *wide, *equal;
1634 BOOL result;
1635
1636 if (!namevalue || !*namevalue)
1637 return 0;
1638
1639 size = strlen(namevalue) * 2 + 1;
1640 wide = calloc(size, sizeof(wchar_t));
1641 if (!wide)
1642 die("Out of memory, (tried to allocate %u wchar_t's)", size);
1643 xutftowcs(wide, namevalue, size);
1644 equal = wcschr(wide, L'=');
1645 if (!equal)
1646 result = SetEnvironmentVariableW(wide, NULL);
1647 else {
1648 *equal = L'\0';
1649 result = SetEnvironmentVariableW(wide, equal + 1);
1650 }
1651 free(wide);
1652
1653 if (!result)
1654 errno = err_win_to_posix(GetLastError());
1655
1656 return result ? 0 : -1;
1657 }
1658
1659 /*
1660 * Note, this isn't a complete replacement for getaddrinfo. It assumes
1661 * that service contains a numerical port, or that it is null. It
1662 * does a simple search using gethostbyname, and returns one IPv4 host
1663 * if one was found.
1664 */
1665 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1666 const struct addrinfo *hints,
1667 struct addrinfo **res)
1668 {
1669 struct hostent *h = NULL;
1670 struct addrinfo *ai;
1671 struct sockaddr_in *sin;
1672
1673 if (node) {
1674 h = gethostbyname(node);
1675 if (!h)
1676 return WSAGetLastError();
1677 }
1678
1679 ai = xmalloc(sizeof(struct addrinfo));
1680 *res = ai;
1681 ai->ai_flags = 0;
1682 ai->ai_family = AF_INET;
1683 ai->ai_socktype = hints ? hints->ai_socktype : 0;
1684 switch (ai->ai_socktype) {
1685 case SOCK_STREAM:
1686 ai->ai_protocol = IPPROTO_TCP;
1687 break;
1688 case SOCK_DGRAM:
1689 ai->ai_protocol = IPPROTO_UDP;
1690 break;
1691 default:
1692 ai->ai_protocol = 0;
1693 break;
1694 }
1695 ai->ai_addrlen = sizeof(struct sockaddr_in);
1696 if (hints && (hints->ai_flags & AI_CANONNAME))
1697 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1698 else
1699 ai->ai_canonname = NULL;
1700
1701 sin = xcalloc(1, ai->ai_addrlen);
1702 sin->sin_family = AF_INET;
1703 /* Note: getaddrinfo is supposed to allow service to be a string,
1704 * which should be looked up using getservbyname. This is
1705 * currently not implemented */
1706 if (service)
1707 sin->sin_port = htons(atoi(service));
1708 if (h)
1709 sin->sin_addr = *(struct in_addr *)h->h_addr;
1710 else if (hints && (hints->ai_flags & AI_PASSIVE))
1711 sin->sin_addr.s_addr = INADDR_ANY;
1712 else
1713 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1714 ai->ai_addr = (struct sockaddr *)sin;
1715 ai->ai_next = NULL;
1716 return 0;
1717 }
1718
1719 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1720 {
1721 free(res->ai_canonname);
1722 free(res->ai_addr);
1723 free(res);
1724 }
1725
1726 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1727 char *host, DWORD hostlen,
1728 char *serv, DWORD servlen, int flags)
1729 {
1730 const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1731 if (sa->sa_family != AF_INET)
1732 return EAI_FAMILY;
1733 if (!host && !serv)
1734 return EAI_NONAME;
1735
1736 if (host && hostlen > 0) {
1737 struct hostent *ent = NULL;
1738 if (!(flags & NI_NUMERICHOST))
1739 ent = gethostbyaddr((const char *)&sin->sin_addr,
1740 sizeof(sin->sin_addr), AF_INET);
1741
1742 if (ent)
1743 snprintf(host, hostlen, "%s", ent->h_name);
1744 else if (flags & NI_NAMEREQD)
1745 return EAI_NONAME;
1746 else
1747 snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1748 }
1749
1750 if (serv && servlen > 0) {
1751 struct servent *ent = NULL;
1752 if (!(flags & NI_NUMERICSERV))
1753 ent = getservbyport(sin->sin_port,
1754 flags & NI_DGRAM ? "udp" : "tcp");
1755
1756 if (ent)
1757 snprintf(serv, servlen, "%s", ent->s_name);
1758 else
1759 snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1760 }
1761
1762 return 0;
1763 }
1764
1765 static HMODULE ipv6_dll = NULL;
1766 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1767 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1768 const struct addrinfo *hints,
1769 struct addrinfo **res);
1770 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1771 char *host, DWORD hostlen,
1772 char *serv, DWORD servlen, int flags);
1773 /*
1774 * gai_strerror is an inline function in the ws2tcpip.h header, so we
1775 * don't need to try to load that one dynamically.
1776 */
1777
1778 static void socket_cleanup(void)
1779 {
1780 WSACleanup();
1781 if (ipv6_dll)
1782 FreeLibrary(ipv6_dll);
1783 ipv6_dll = NULL;
1784 ipv6_freeaddrinfo = freeaddrinfo_stub;
1785 ipv6_getaddrinfo = getaddrinfo_stub;
1786 ipv6_getnameinfo = getnameinfo_stub;
1787 }
1788
1789 static void ensure_socket_initialization(void)
1790 {
1791 WSADATA wsa;
1792 static int initialized = 0;
1793 const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1794 const char **name;
1795
1796 if (initialized)
1797 return;
1798
1799 if (WSAStartup(MAKEWORD(2,2), &wsa))
1800 die("unable to initialize winsock subsystem, error %d",
1801 WSAGetLastError());
1802
1803 for (name = libraries; *name; name++) {
1804 ipv6_dll = LoadLibraryExA(*name, NULL,
1805 LOAD_LIBRARY_SEARCH_SYSTEM32);
1806 if (!ipv6_dll)
1807 continue;
1808
1809 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1810 GetProcAddress(ipv6_dll, "freeaddrinfo");
1811 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1812 const struct addrinfo *,
1813 struct addrinfo **))
1814 GetProcAddress(ipv6_dll, "getaddrinfo");
1815 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1816 socklen_t, char *, DWORD,
1817 char *, DWORD, int))
1818 GetProcAddress(ipv6_dll, "getnameinfo");
1819 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1820 FreeLibrary(ipv6_dll);
1821 ipv6_dll = NULL;
1822 } else
1823 break;
1824 }
1825 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1826 ipv6_freeaddrinfo = freeaddrinfo_stub;
1827 ipv6_getaddrinfo = getaddrinfo_stub;
1828 ipv6_getnameinfo = getnameinfo_stub;
1829 }
1830
1831 atexit(socket_cleanup);
1832 initialized = 1;
1833 }
1834
1835 #undef gethostname
1836 int mingw_gethostname(char *name, int namelen)
1837 {
1838 ensure_socket_initialization();
1839 return gethostname(name, namelen);
1840 }
1841
1842 #undef gethostbyname
1843 struct hostent *mingw_gethostbyname(const char *host)
1844 {
1845 ensure_socket_initialization();
1846 return gethostbyname(host);
1847 }
1848
1849 void mingw_freeaddrinfo(struct addrinfo *res)
1850 {
1851 ipv6_freeaddrinfo(res);
1852 }
1853
1854 int mingw_getaddrinfo(const char *node, const char *service,
1855 const struct addrinfo *hints, struct addrinfo **res)
1856 {
1857 ensure_socket_initialization();
1858 return ipv6_getaddrinfo(node, service, hints, res);
1859 }
1860
1861 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1862 char *host, DWORD hostlen, char *serv, DWORD servlen,
1863 int flags)
1864 {
1865 ensure_socket_initialization();
1866 return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1867 }
1868
1869 int mingw_socket(int domain, int type, int protocol)
1870 {
1871 int sockfd;
1872 SOCKET s;
1873
1874 ensure_socket_initialization();
1875 s = WSASocket(domain, type, protocol, NULL, 0, 0);
1876 if (s == INVALID_SOCKET) {
1877 /*
1878 * WSAGetLastError() values are regular BSD error codes
1879 * biased by WSABASEERR.
1880 * However, strerror() does not know about networking
1881 * specific errors, which are values beginning at 38 or so.
1882 * Therefore, we choose to leave the biased error code
1883 * in errno so that _if_ someone looks up the code somewhere,
1884 * then it is at least the number that are usually listed.
1885 */
1886 errno = WSAGetLastError();
1887 return -1;
1888 }
1889 /* convert into a file descriptor */
1890 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1891 closesocket(s);
1892 return error("unable to make a socket file descriptor: %s",
1893 strerror(errno));
1894 }
1895 return sockfd;
1896 }
1897
1898 #undef connect
1899 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1900 {
1901 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1902 return connect(s, sa, sz);
1903 }
1904
1905 #undef bind
1906 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1907 {
1908 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1909 return bind(s, sa, sz);
1910 }
1911
1912 #undef setsockopt
1913 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1914 {
1915 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1916 return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1917 }
1918
1919 #undef shutdown
1920 int mingw_shutdown(int sockfd, int how)
1921 {
1922 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1923 return shutdown(s, how);
1924 }
1925
1926 #undef listen
1927 int mingw_listen(int sockfd, int backlog)
1928 {
1929 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1930 return listen(s, backlog);
1931 }
1932
1933 #undef accept
1934 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1935 {
1936 int sockfd2;
1937
1938 SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1939 SOCKET s2 = accept(s1, sa, sz);
1940
1941 /* convert into a file descriptor */
1942 if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1943 int err = errno;
1944 closesocket(s2);
1945 return error("unable to make a socket file descriptor: %s",
1946 strerror(err));
1947 }
1948 return sockfd2;
1949 }
1950
1951 #undef rename
1952 int mingw_rename(const char *pold, const char *pnew)
1953 {
1954 DWORD attrs, gle;
1955 int tries = 0;
1956 wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1957 if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1958 return -1;
1959
1960 /*
1961 * Try native rename() first to get errno right.
1962 * It is based on MoveFile(), which cannot overwrite existing files.
1963 */
1964 if (!_wrename(wpold, wpnew))
1965 return 0;
1966 if (errno != EEXIST)
1967 return -1;
1968 repeat:
1969 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1970 return 0;
1971 /* TODO: translate more errors */
1972 gle = GetLastError();
1973 if (gle == ERROR_ACCESS_DENIED &&
1974 (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1975 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1976 DWORD attrsold = GetFileAttributesW(wpold);
1977 if (attrsold == INVALID_FILE_ATTRIBUTES ||
1978 !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
1979 errno = EISDIR;
1980 else if (!_wrmdir(wpnew))
1981 goto repeat;
1982 return -1;
1983 }
1984 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1985 SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1986 if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1987 return 0;
1988 gle = GetLastError();
1989 /* revert file attributes on failure */
1990 SetFileAttributesW(wpnew, attrs);
1991 }
1992 }
1993 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1994 /*
1995 * We assume that some other process had the source or
1996 * destination file open at the wrong moment and retry.
1997 * In order to give the other process a higher chance to
1998 * complete its operation, we give up our time slice now.
1999 * If we have to retry again, we do sleep a bit.
2000 */
2001 Sleep(delay[tries]);
2002 tries++;
2003 goto repeat;
2004 }
2005 if (gle == ERROR_ACCESS_DENIED &&
2006 ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
2007 "Should I try again?", pold, pnew))
2008 goto repeat;
2009
2010 errno = EACCES;
2011 return -1;
2012 }
2013
2014 /*
2015 * Note that this doesn't return the actual pagesize, but
2016 * the allocation granularity. If future Windows specific git code
2017 * needs the real getpagesize function, we need to find another solution.
2018 */
2019 int mingw_getpagesize(void)
2020 {
2021 SYSTEM_INFO si;
2022 GetSystemInfo(&si);
2023 return si.dwAllocationGranularity;
2024 }
2025
2026 /* See https://msdn.microsoft.com/en-us/library/windows/desktop/ms724435.aspx */
2027 enum EXTENDED_NAME_FORMAT {
2028 NameDisplay = 3,
2029 NameUserPrincipal = 8
2030 };
2031
2032 static char *get_extended_user_info(enum EXTENDED_NAME_FORMAT type)
2033 {
2034 DECLARE_PROC_ADDR(secur32.dll, BOOL, GetUserNameExW,
2035 enum EXTENDED_NAME_FORMAT, LPCWSTR, PULONG);
2036 static wchar_t wbuffer[1024];
2037 DWORD len;
2038
2039 if (!INIT_PROC_ADDR(GetUserNameExW))
2040 return NULL;
2041
2042 len = ARRAY_SIZE(wbuffer);
2043 if (GetUserNameExW(type, wbuffer, &len)) {
2044 char *converted = xmalloc((len *= 3));
2045 if (xwcstoutf(converted, wbuffer, len) >= 0)
2046 return converted;
2047 free(converted);
2048 }
2049
2050 return NULL;
2051 }
2052
2053 char *mingw_query_user_email(void)
2054 {
2055 return get_extended_user_info(NameUserPrincipal);
2056 }
2057
2058 struct passwd *getpwuid(int uid)
2059 {
2060 static unsigned initialized;
2061 static char user_name[100];
2062 static struct passwd *p;
2063 DWORD len;
2064
2065 if (initialized)
2066 return p;
2067
2068 len = sizeof(user_name);
2069 if (!GetUserName(user_name, &len)) {
2070 initialized = 1;
2071 return NULL;
2072 }
2073
2074 p = xmalloc(sizeof(*p));
2075 p->pw_name = user_name;
2076 p->pw_gecos = get_extended_user_info(NameDisplay);
2077 if (!p->pw_gecos)
2078 p->pw_gecos = "unknown";
2079 p->pw_dir = NULL;
2080
2081 initialized = 1;
2082 return p;
2083 }
2084
2085 static HANDLE timer_event;
2086 static HANDLE timer_thread;
2087 static int timer_interval;
2088 static int one_shot;
2089 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
2090
2091 /* The timer works like this:
2092 * The thread, ticktack(), is a trivial routine that most of the time
2093 * only waits to receive the signal to terminate. The main thread tells
2094 * the thread to terminate by setting the timer_event to the signalled
2095 * state.
2096 * But ticktack() interrupts the wait state after the timer's interval
2097 * length to call the signal handler.
2098 */
2099
2100 static unsigned __stdcall ticktack(void *dummy)
2101 {
2102 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
2103 mingw_raise(SIGALRM);
2104 if (one_shot)
2105 break;
2106 }
2107 return 0;
2108 }
2109
2110 static int start_timer_thread(void)
2111 {
2112 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
2113 if (timer_event) {
2114 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
2115 if (!timer_thread )
2116 return errno = ENOMEM,
2117 error("cannot start timer thread");
2118 } else
2119 return errno = ENOMEM,
2120 error("cannot allocate resources for timer");
2121 return 0;
2122 }
2123
2124 static void stop_timer_thread(void)
2125 {
2126 if (timer_event)
2127 SetEvent(timer_event); /* tell thread to terminate */
2128 if (timer_thread) {
2129 int rc = WaitForSingleObject(timer_thread, 1000);
2130 if (rc == WAIT_TIMEOUT)
2131 error("timer thread did not terminate timely");
2132 else if (rc != WAIT_OBJECT_0)
2133 error("waiting for timer thread failed: %lu",
2134 GetLastError());
2135 CloseHandle(timer_thread);
2136 }
2137 if (timer_event)
2138 CloseHandle(timer_event);
2139 timer_event = NULL;
2140 timer_thread = NULL;
2141 }
2142
2143 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
2144 {
2145 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
2146 }
2147
2148 int setitimer(int type, struct itimerval *in, struct itimerval *out)
2149 {
2150 static const struct timeval zero;
2151 static int atexit_done;
2152
2153 if (out != NULL)
2154 return errno = EINVAL,
2155 error("setitimer param 3 != NULL not implemented");
2156 if (!is_timeval_eq(&in->it_interval, &zero) &&
2157 !is_timeval_eq(&in->it_interval, &in->it_value))
2158 return errno = EINVAL,
2159 error("setitimer: it_interval must be zero or eq it_value");
2160
2161 if (timer_thread)
2162 stop_timer_thread();
2163
2164 if (is_timeval_eq(&in->it_value, &zero) &&
2165 is_timeval_eq(&in->it_interval, &zero))
2166 return 0;
2167
2168 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
2169 one_shot = is_timeval_eq(&in->it_interval, &zero);
2170 if (!atexit_done) {
2171 atexit(stop_timer_thread);
2172 atexit_done = 1;
2173 }
2174 return start_timer_thread();
2175 }
2176
2177 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
2178 {
2179 if (sig != SIGALRM)
2180 return errno = EINVAL,
2181 error("sigaction only implemented for SIGALRM");
2182 if (out != NULL)
2183 return errno = EINVAL,
2184 error("sigaction: param 3 != NULL not implemented");
2185
2186 timer_fn = in->sa_handler;
2187 return 0;
2188 }
2189
2190 #undef signal
2191 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
2192 {
2193 sig_handler_t old;
2194
2195 switch (sig) {
2196 case SIGALRM:
2197 old = timer_fn;
2198 timer_fn = handler;
2199 break;
2200
2201 case SIGINT:
2202 old = sigint_fn;
2203 sigint_fn = handler;
2204 break;
2205
2206 default:
2207 return signal(sig, handler);
2208 }
2209
2210 return old;
2211 }
2212
2213 #undef raise
2214 int mingw_raise(int sig)
2215 {
2216 switch (sig) {
2217 case SIGALRM:
2218 if (timer_fn == SIG_DFL) {
2219 if (isatty(STDERR_FILENO))
2220 fputs("Alarm clock\n", stderr);
2221 exit(128 + SIGALRM);
2222 } else if (timer_fn != SIG_IGN)
2223 timer_fn(SIGALRM);
2224 return 0;
2225
2226 case SIGINT:
2227 if (sigint_fn == SIG_DFL)
2228 exit(128 + SIGINT);
2229 else if (sigint_fn != SIG_IGN)
2230 sigint_fn(SIGINT);
2231 return 0;
2232
2233 default:
2234 return raise(sig);
2235 }
2236 }
2237
2238 int link(const char *oldpath, const char *newpath)
2239 {
2240 wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
2241 if (xutftowcs_path(woldpath, oldpath) < 0 ||
2242 xutftowcs_path(wnewpath, newpath) < 0)
2243 return -1;
2244
2245 if (!CreateHardLinkW(wnewpath, woldpath, NULL)) {
2246 errno = err_win_to_posix(GetLastError());
2247 return -1;
2248 }
2249 return 0;
2250 }
2251
2252 pid_t waitpid(pid_t pid, int *status, int options)
2253 {
2254 HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
2255 FALSE, pid);
2256 if (!h) {
2257 errno = ECHILD;
2258 return -1;
2259 }
2260
2261 if (pid > 0 && options & WNOHANG) {
2262 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
2263 CloseHandle(h);
2264 return 0;
2265 }
2266 options &= ~WNOHANG;
2267 }
2268
2269 if (options == 0) {
2270 struct pinfo_t **ppinfo;
2271 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
2272 CloseHandle(h);
2273 return 0;
2274 }
2275
2276 if (status)
2277 GetExitCodeProcess(h, (LPDWORD)status);
2278
2279 EnterCriticalSection(&pinfo_cs);
2280
2281 ppinfo = &pinfo;
2282 while (*ppinfo) {
2283 struct pinfo_t *info = *ppinfo;
2284 if (info->pid == pid) {
2285 CloseHandle(info->proc);
2286 *ppinfo = info->next;
2287 free(info);
2288 break;
2289 }
2290 ppinfo = &info->next;
2291 }
2292
2293 LeaveCriticalSection(&pinfo_cs);
2294
2295 CloseHandle(h);
2296 return pid;
2297 }
2298 CloseHandle(h);
2299
2300 errno = EINVAL;
2301 return -1;
2302 }
2303
2304 int mingw_has_dos_drive_prefix(const char *path)
2305 {
2306 int i;
2307
2308 /*
2309 * Does it start with an ASCII letter (i.e. highest bit not set),
2310 * followed by a colon?
2311 */
2312 if (!(0x80 & (unsigned char)*path))
2313 return *path && path[1] == ':' ? 2 : 0;
2314
2315 /*
2316 * While drive letters must be letters of the English alphabet, it is
2317 * possible to assign virtually _any_ Unicode character via `subst` as
2318 * a drive letter to "virtual drives". Even `1`, or `ä`. Or fun stuff
2319 * like this:
2320 *
2321 * subst ֍: %USERPROFILE%\Desktop
2322 */
2323 for (i = 1; i < 4 && (0x80 & (unsigned char)path[i]); i++)
2324 ; /* skip first UTF-8 character */
2325 return path[i] == ':' ? i + 1 : 0;
2326 }
2327
2328 int mingw_skip_dos_drive_prefix(char **path)
2329 {
2330 int ret = has_dos_drive_prefix(*path);
2331 *path += ret;
2332 return ret;
2333 }
2334
2335 int mingw_offset_1st_component(const char *path)
2336 {
2337 char *pos = (char *)path;
2338
2339 /* unc paths */
2340 if (!skip_dos_drive_prefix(&pos) &&
2341 is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
2342 /* skip server name */
2343 pos = strpbrk(pos + 2, "\\/");
2344 if (!pos)
2345 return 0; /* Error: malformed unc path */
2346
2347 do {
2348 pos++;
2349 } while (*pos && !is_dir_sep(*pos));
2350 }
2351
2352 return pos + is_dir_sep(*pos) - path;
2353 }
2354
2355 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2356 {
2357 int upos = 0, wpos = 0;
2358 const unsigned char *utf = (const unsigned char*) utfs;
2359 if (!utf || !wcs || wcslen < 1) {
2360 errno = EINVAL;
2361 return -1;
2362 }
2363 /* reserve space for \0 */
2364 wcslen--;
2365 if (utflen < 0)
2366 utflen = INT_MAX;
2367
2368 while (upos < utflen) {
2369 int c = utf[upos++] & 0xff;
2370 if (utflen == INT_MAX && c == 0)
2371 break;
2372
2373 if (wpos >= wcslen) {
2374 wcs[wpos] = 0;
2375 errno = ERANGE;
2376 return -1;
2377 }
2378
2379 if (c < 0x80) {
2380 /* ASCII */
2381 wcs[wpos++] = c;
2382 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2383 (utf[upos] & 0xc0) == 0x80) {
2384 /* 2-byte utf-8 */
2385 c = ((c & 0x1f) << 6);
2386 c |= (utf[upos++] & 0x3f);
2387 wcs[wpos++] = c;
2388 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2389 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2390 (utf[upos] & 0xc0) == 0x80 &&
2391 (utf[upos + 1] & 0xc0) == 0x80) {
2392 /* 3-byte utf-8 */
2393 c = ((c & 0x0f) << 12);
2394 c |= ((utf[upos++] & 0x3f) << 6);
2395 c |= (utf[upos++] & 0x3f);
2396 wcs[wpos++] = c;
2397 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2398 wpos + 1 < wcslen &&
2399 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2400 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2401 (utf[upos] & 0xc0) == 0x80 &&
2402 (utf[upos + 1] & 0xc0) == 0x80 &&
2403 (utf[upos + 2] & 0xc0) == 0x80) {
2404 /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2405 c = ((c & 0x07) << 18);
2406 c |= ((utf[upos++] & 0x3f) << 12);
2407 c |= ((utf[upos++] & 0x3f) << 6);
2408 c |= (utf[upos++] & 0x3f);
2409 c -= 0x10000;
2410 wcs[wpos++] = 0xd800 | (c >> 10);
2411 wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2412 } else if (c >= 0xa0) {
2413 /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2414 wcs[wpos++] = c;
2415 } else {
2416 /* invalid utf-8 byte, non-printable unicode: convert to hex */
2417 static const char *hex = "0123456789abcdef";
2418 wcs[wpos++] = hex[c >> 4];
2419 if (wpos < wcslen)
2420 wcs[wpos++] = hex[c & 0x0f];
2421 }
2422 }
2423 wcs[wpos] = 0;
2424 return wpos;
2425 }
2426
2427 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2428 {
2429 if (!wcs || !utf || utflen < 1) {
2430 errno = EINVAL;
2431 return -1;
2432 }
2433 utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2434 if (utflen)
2435 return utflen - 1;
2436 errno = ERANGE;
2437 return -1;
2438 }
2439
2440 static void setup_windows_environment(void)
2441 {
2442 char *tmp = getenv("TMPDIR");
2443
2444 /* on Windows it is TMP and TEMP */
2445 if (!tmp) {
2446 if (!(tmp = getenv("TMP")))
2447 tmp = getenv("TEMP");
2448 if (tmp) {
2449 setenv("TMPDIR", tmp, 1);
2450 tmp = getenv("TMPDIR");
2451 }
2452 }
2453
2454 if (tmp) {
2455 /*
2456 * Convert all dir separators to forward slashes,
2457 * to help shell commands called from the Git
2458 * executable (by not mistaking the dir separators
2459 * for escape characters).
2460 */
2461 convert_slashes(tmp);
2462 }
2463
2464 /* simulate TERM to enable auto-color (see color.c) */
2465 if (!getenv("TERM"))
2466 setenv("TERM", "cygwin", 1);
2467 }
2468
2469 int is_valid_win32_path(const char *path)
2470 {
2471 int preceding_space_or_period = 0, i = 0, periods = 0;
2472
2473 if (!protect_ntfs)
2474 return 1;
2475
2476 skip_dos_drive_prefix((char **)&path);
2477
2478 for (;;) {
2479 char c = *(path++);
2480 switch (c) {
2481 case '\0':
2482 case '/': case '\\':
2483 /* cannot end in ` ` or `.`, except for `.` and `..` */
2484 if (preceding_space_or_period &&
2485 (i != periods || periods > 2))
2486 return 0;
2487 if (!c)
2488 return 1;
2489
2490 i = periods = preceding_space_or_period = 0;
2491 continue;
2492 case '.':
2493 periods++;
2494 /* fallthru */
2495 case ' ':
2496 preceding_space_or_period = 1;
2497 i++;
2498 continue;
2499 case ':': /* DOS drive prefix was already skipped */
2500 case '<': case '>': case '"': case '|': case '?': case '*':
2501 /* illegal character */
2502 return 0;
2503 default:
2504 if (c > '\0' && c < '\x20')
2505 /* illegal character */
2506 return 0;
2507 }
2508 preceding_space_or_period = 0;
2509 i++;
2510 }
2511 }
2512
2513 /*
2514 * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2515 * mingw startup code, see init.c in mingw runtime).
2516 */
2517 int _CRT_glob = 0;
2518
2519 typedef struct {
2520 int newmode;
2521 } _startupinfo;
2522
2523 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2524 _startupinfo *si);
2525
2526 static NORETURN void die_startup(void)
2527 {
2528 fputs("fatal: not enough memory for initialization", stderr);
2529 exit(128);
2530 }
2531
2532 static void *malloc_startup(size_t size)
2533 {
2534 void *result = malloc(size);
2535 if (!result)
2536 die_startup();
2537 return result;
2538 }
2539
2540 static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2541 {
2542 len = xwcstoutf(buffer, wcs, len) + 1;
2543 return memcpy(malloc_startup(len), buffer, len);
2544 }
2545
2546 static void maybe_redirect_std_handle(const wchar_t *key, DWORD std_id, int fd,
2547 DWORD desired_access, DWORD flags)
2548 {
2549 DWORD create_flag = fd ? OPEN_ALWAYS : OPEN_EXISTING;
2550 wchar_t buf[MAX_PATH];
2551 DWORD max = ARRAY_SIZE(buf);
2552 HANDLE handle;
2553 DWORD ret = GetEnvironmentVariableW(key, buf, max);
2554
2555 if (!ret || ret >= max)
2556 return;
2557
2558 /* make sure this does not leak into child processes */
2559 SetEnvironmentVariableW(key, NULL);
2560 if (!wcscmp(buf, L"off")) {
2561 close(fd);
2562 handle = GetStdHandle(std_id);
2563 if (handle != INVALID_HANDLE_VALUE)
2564 CloseHandle(handle);
2565 return;
2566 }
2567 if (std_id == STD_ERROR_HANDLE && !wcscmp(buf, L"2>&1")) {
2568 handle = GetStdHandle(STD_OUTPUT_HANDLE);
2569 if (handle == INVALID_HANDLE_VALUE) {
2570 close(fd);
2571 handle = GetStdHandle(std_id);
2572 if (handle != INVALID_HANDLE_VALUE)
2573 CloseHandle(handle);
2574 } else {
2575 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2576 SetStdHandle(std_id, handle);
2577 dup2(new_fd, fd);
2578 /* do *not* close the new_fd: that would close stdout */
2579 }
2580 return;
2581 }
2582 handle = CreateFileW(buf, desired_access, 0, NULL, create_flag,
2583 flags, NULL);
2584 if (handle != INVALID_HANDLE_VALUE) {
2585 int new_fd = _open_osfhandle((intptr_t)handle, O_BINARY);
2586 SetStdHandle(std_id, handle);
2587 dup2(new_fd, fd);
2588 close(new_fd);
2589 }
2590 }
2591
2592 static void maybe_redirect_std_handles(void)
2593 {
2594 maybe_redirect_std_handle(L"GIT_REDIRECT_STDIN", STD_INPUT_HANDLE, 0,
2595 GENERIC_READ, FILE_ATTRIBUTE_NORMAL);
2596 maybe_redirect_std_handle(L"GIT_REDIRECT_STDOUT", STD_OUTPUT_HANDLE, 1,
2597 GENERIC_WRITE, FILE_ATTRIBUTE_NORMAL);
2598 maybe_redirect_std_handle(L"GIT_REDIRECT_STDERR", STD_ERROR_HANDLE, 2,
2599 GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
2600 }
2601
2602 void mingw_startup(void)
2603 {
2604 int i, maxlen, argc;
2605 char *buffer;
2606 wchar_t **wenv, **wargv;
2607 _startupinfo si;
2608
2609 maybe_redirect_std_handles();
2610
2611 /* get wide char arguments and environment */
2612 si.newmode = 0;
2613 if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2614 die_startup();
2615
2616 /* determine size of argv and environ conversion buffer */
2617 maxlen = wcslen(wargv[0]);
2618 for (i = 1; i < argc; i++)
2619 maxlen = max(maxlen, wcslen(wargv[i]));
2620
2621 /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2622 maxlen = 3 * maxlen + 1;
2623 buffer = malloc_startup(maxlen);
2624
2625 /* convert command line arguments and environment to UTF-8 */
2626 for (i = 0; i < argc; i++)
2627 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2628 free(buffer);
2629
2630 /* fix Windows specific environment settings */
2631 setup_windows_environment();
2632
2633 unset_environment_variables = xstrdup("PERL5LIB");
2634
2635 /* initialize critical section for waitpid pinfo_t list */
2636 InitializeCriticalSection(&pinfo_cs);
2637
2638 /* set up default file mode and file modes for stdin/out/err */
2639 _fmode = _O_BINARY;
2640 _setmode(_fileno(stdin), _O_BINARY);
2641 _setmode(_fileno(stdout), _O_BINARY);
2642 _setmode(_fileno(stderr), _O_BINARY);
2643
2644 /* initialize Unicode console */
2645 winansi_init();
2646 }
2647
2648 int uname(struct utsname *buf)
2649 {
2650 unsigned v = (unsigned)GetVersion();
2651 memset(buf, 0, sizeof(*buf));
2652 xsnprintf(buf->sysname, sizeof(buf->sysname), "Windows");
2653 xsnprintf(buf->release, sizeof(buf->release),
2654 "%u.%u", v & 0xff, (v >> 8) & 0xff);
2655 /* assuming NT variants only.. */
2656 xsnprintf(buf->version, sizeof(buf->version),
2657 "%u", (v >> 16) & 0x7fff);
2658 return 0;
2659 }
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